Oven-roof.



B. B. KAHN.

OVEN ROOF.

APPLICATION man NOV. 18, 1914.

V Patented July 13, 1915.

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IBERTBANID B. KAHN, OE CINCINNATI, OHIO, ASSIGNOR TO THE ESTATE STOVECOMPANY, OF HAMILTON, OHIO.

OVEN-ROOF.

Specification of Letters Patent.

Patented July-13, 1915.

Application filed November 18, 1914. Serial No. 872,676.

' Cincinnati, Hamilton county, Ohio, have invented certain new anduseful Improvements in Oven-Roofs, of which the following is aspecification.

This invention pertains to improvements in the lining plates for theroofs of ovens in gas cooking stoves, and the invention will be readilyunderstood from the following description taken inconnection with theaccompanying drawing in which Figure 1 is a vertical section of a gasstove provided with my improved ovenroof, the section being in the planeof line b of Figs. 2 and 3; Fig. 2 a vertical section of the same in theplane of line a of Figs. 1, 3 and 4; Fig. 3 a perspective view of thelower plate of the improved roof; and Fig. 4 a vertical sectionof thelower plate of the improved roof in the plane of line 0 of Figs. 2 and3.

In the drawing :1, indicates the outer Walls of an ordinary gas cookingstove; 2, the open main top thereof; 3, the opening in the main top toreceive the usual grids on which cooking utensils may be rested; 4, thelining plates forming the oven side walls and disposed at some vdistancefrom the outer walls 1, so as to form flues at the sides of the oven; 5,the floor of the oven; 6, the oven burners disposed below the oven; 7,the floor of the main top chamber, the same being disposed below maintop 2 and above the oven; 8, the oven roof-plate, the same beingdisposed below floor 7 of the main top chamber so as to leave ahorizontal flue between. the roof of the oven and the floor of the maintop chamber; 9, a pair of curved ribs struck up from the upper surfaceof oven roof-plate 8, their tops reach ing to the floor 7 of the maintop chamber, these ribs being struck up from the metal of ovenroof-plate 8 so as to produce thin walls for the ribs, the ribsextending fore and aft of the oven roof and having their forward endsnear the front of the oven roof and somewhat separated and having theirrear ends separated as far as possible consistent with the width of theoven roof; 10, apertures in the forward portion of the oven roof-plate,leading from the oven to the horizontal flue-space between the roofplateof the oven and the floor of the main top chamber; 11, the main topchamber formed between oven roof-plate 8 and the vmain top 3 and adaptedfor the reception of the usual burners for supplying heat to vesselsplaced on the main top; 12, the horizontal flue formed between the ovenrooffor communication, preferably, with a chimney flue; 14, ahorizontalflue disposed between the oven burners'and the floor of the oven; 15, afresh air flue leading to flue 14;

16, apertures in the front portion of the floorof the oven, placing theoven in communication with flue 14; 17, arrows indieating the course ofthe products of combustion from the neighborhood of the oven burnerstothe horizontal, flue 12 between oven roof-plate 8 and the floor of themain top chamber;'and 18, the'vertical flues at the sides of the oven,extending from the region of the oven burners 6 to the horizontal flue12.

All of the parts thus far referred to, with the exception of ribs 9, areor may be as usual in the construction of gas cooking stoves. The wasteproducts of combustion from oven burners 6 follow the arrows 17 and gothrough flues 18 into the horizontal fiue'12 from whence they go tothechimney outlet 13. These products carry a very considerable degree ofheat. The products from the oven, resulting from the admission of airtothe oven through openings 16, leave the oven at openings 10 and gothrough horizontal flue 12 to the chimney outlet 13. These products fromthe oven contain some degree of heat.

Proceeding with the drawing :19 1ndicates a rib projecting from the topof the roof-plate of the oven, transversely of ribs 9 and having itsends at some distance inwardly from the inner surfaces of ribs 9, thisrib 19 being struck up fromthe metal of the oven roof-plate so as topresent a rib above the oven roof-plate and a recess below incommunication with the oven.

The ribs 9 and 19 have a height such that they will make contact withthe floor-plate 7 of the main top-chamber and prevent the passage ofproducts over their tops, and the rear extremities of ribs 9 have suchwidth that they will practically cut ofl communication between verticalflues 18 and-chinmey outlet 13.

The products rising from vertical flues 18 and entering the chamber 12at the top of the oven will, having no other outlet, be deflectedforwardly to the gap between the forward ends of ribs .9, and from thisgap the products will move rearwardly and, being deflected by rib 19,will move sidewise and turn rearwardly around the ends of that rib andthen find their way to chimney outlet 18. These products from the ovenburners, carrying a very considerable degree of heat, will thus becaused to spread themselves over substantially the entire upper surfaceof the roof-plate of the oven and heat the metal of that roof-plate andcause heat to be radiated downwardly into the oven, and, owing to thethinness of the walls of ribs 9 and 19, the interior surfaces of theseribs also radiate heat downwardly into the oven. And it is so, also,with the products rising from the oven through openings 10, and whilethose products may carry a small degree of heat compared with the amountof heat carried by the products rising from the oven burners, if therebe in these products from the oven a degree of heat in excess of thatinthe oven, heat will act on the roof-plate of the oven, and be radiateddownwardly into the oven and the struck up ribs 9 and 19, serving indeflecting these products from the oven, will, owing to the thinness oftheir walls, also aid in conveying heat to the oven.

The superior capacity of the ribs 9 and 19 to pick up heat from theproducts passing rearwardly through horizontal flue 12 and radiate heatdownwardly into the oven is due to the thinness of the walls of thoseribs, and the struck up character of the ribs provides not only for thethinness of the walls of the ribs, but for the openings in the ovenroof-plate which permit the free downward radiation of heat from thethin walls, the construction thus obviously avoiding the necessity forproviding especial openings in the roof-plate of the oven to permitradiation from the inner surfaces of the ribs to the interior of theoven.

1 claim 1. An oven-roof comprising, a plate forming the floor of a maintop chamber, an oven roof-plate disposed below said floor-plate to forma horizontal flue adapted for connection with a chimney-outlet, hollowdefleeting ribs projecting up from the oven roof-plate and having theircrests in engage-- ment with said floor-plate, the bases of said ribsbeing open to the oven-space below the oven roof-plate, combinedsubstantially as set forth.

2. An oven-roof comprising, a plate forming the floor of a main topchamber, a sheet metal oven roof-plate disposed below said floor plateto form a horizontal flue adapted for connection with a chimney outlet,hollow deflecting ribs having their sides and ends struck up from theoven roof-plate and having their crests engaging with said floorplate,the bases of said ribs being open to the oven-space below the ovenroof-plate, combined substantially as set forth.

BERTRAND B. KAHN.

Witnesses:

M. S. BELDEN, G110. JOHNSON.

Copies of this patent may be obtained. for five cents each, byaddressing the Commissioner of Patents,

Washington, D. G.

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